Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Fabrication of Low-cost and Flexible Potassium Ion Sensors based on Screen Printing and Their Electrochemical Characteristics

스크린 프린팅 기반 저가형의 플렉서블 칼륨 이온 센서 제조 및 이의 전기화학적 특성

  • Son, Seon Gyu (Department of Chemical Engineering, Kangwon National University) ;
  • Park, Hong Jun (Department of Chemical Engineering, Kangwon National University) ;
  • Kim, Yeong Kyun (Department of Chemical Engineering, Kangwon National University) ;
  • Cho, Hyeon-Sang (Department of Chemical Engineering, Kangwon National University) ;
  • Choi, Bong Gill (Department of Chemical Engineering, Kangwon National University)
  • 손선규 (강원대학교(삼척캠퍼스) 화학공학과) ;
  • 박홍준 (강원대학교(삼척캠퍼스) 화학공학과) ;
  • 김영균 (강원대학교(삼척캠퍼스) 화학공학과) ;
  • 조현상 (강원대학교(삼척캠퍼스) 화학공학과) ;
  • 최봉길 (강원대학교(삼척캠퍼스) 화학공학과)
  • Received : 2019.11.03
  • Accepted : 2019.11.20
  • Published : 2019.12.10
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Abstract

A low-cost and flexible potassium ion (K+) sensor was fabricated through a screen-printed process. Uniform and conformal coating of conductive inks was verified by scanning electron microscopy and optical microscopy measurements. The K+-sensors showed a high sensitivity, fast response time, and low detection limit. The sensitivity of K+-sensor was similar to that of both mechanically normal and bent states. The K+-sensor exhibited a good reproducibility with no hysteresis effect and excellent long term stability. In addition, the K+-sensor showed an excellent selectivity for K+ concentrations in the presence of other interfering cation ions. Successful measurements of K+ concentrations in sports drink samples were demonstrated by comparing K+ concentration values from K+-sensor to those of using a commercial K+-meter.

본 연구에서는 스크린 프린팅 공정을 이용하여 저렴하고 유연한 칼륨 이온(K+) 센서를 제작하였다. 전도성 잉크의 균일한 코팅은 주사 전자 현미경 및 광학 현미경 측정에 의해 입증되었다. K+ 센서는 높은 감도, 빠른 응답 시간, 낮은 검출 한계를 보여주었다. 제조된 K+ 센서의 감도는 기계적으로 구부러진 상태에도 여전히 유지되었다. 히스테리시스 효과가 없는 우수한 반복성과 우수한 장기 안정성이 K+ 센서의 전기화학적 특성 분석에서 관찰되었다. 또한, K+ 센서는 다른 간섭 양이온이 존재하는 경우에도 정확하게 K+ 농도를 측정 할 수 있어 우수한 선택성을 증명하였다. 또한, 실제 스포츠 음료 샘플에서 K+ 농도의 성공적인 측정은 K+ 센서의 K+ 농도 값과 상용 K+ 미터를 비교하여 증명되었다.

Keywords

References

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